package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.atguigu.springcloud.service.impl.PaymentFallbackServiceImpl;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

/**
 * @author daiyongfei
 * cloud-eureka-payment-service
 * <p>
 * fallback = PaymentFallbackServiceImpl.class 指定降级处理类
 * <p>
 * 熔断service
 */
@Component
public class PaymentHystrixBreakerService {

    /**
     * 服务熔断
     * <p>
     * 开启断路器
     * 10 秒 内  10次请求 失败率 达到 60 % 开启 降级
     *
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),// 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),// 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), // 时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),// 失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用成功，流水号: " + serialNumber;
    }


    /**
     * paymentCircuitBreaker 降级兜底方法
     *
     * @param id
     * @return
     */
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " + id;
    }

}
